To complete the astigmatism test please follow these five steps:
If you wear glasses or contact lenses, put them on.
Sit about 35 cm (14 inches) away from your computer screen.
Look at the chart with your hand covering one eye.
How do the lines appear? (Are they all equally clear and sharp?)
Follow these steps again to test the other eye.
If you suspect you have astigmatism you should visit your optician and ask for an eye examination. Your optician will use an astigmatism chart to help determine the curvature of your cornea or lens. An abnormal curvature will sharply focus parts of the image onto your retina, while blurring others.
Astigmatism can cause blurred vision when you are trying to focus on activities that require you to see objects at long distances, such as road signs. It can also affect your vision for close activities, such as reading or sewing. If left uncorrected, astigmatism can lead to headaches, fatigue, squinting and pain in the muscles around your eye.
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